function advagg_drupal_load_stylesheet_content in Advanced CSS/JS Aggregation 7

Same name and namespace in other branches

1. 6 advagg.module \advagg_drupal_load_stylesheet_content()

Process the contents of a stylesheet for aggregation.

Parameters

$contents: The contents of the stylesheet.

$optimize: (optional) Boolean whether CSS contents should be minified. Defaults to FALSE.

Return value

Contents of the stylesheet including the imported stylesheets.

1 call to advagg_drupal_load_stylesheet_content()

advagg_process_css in includes/css.inc

Returns a themed representation of all stylesheets that should be attached to the page.

File

./advagg.module, line 2725

Advanced CSS/JS aggregation module

Code

function advagg_drupal_load_stylesheet_content($contents, $optimize = FALSE) {

  // Remove multiple charset declarations for standards compliance (and fixing Safari problems).
  $contents = preg_replace('/^@charset\\s+[\'"](\\S*)\\b[\'"];/i', '', $contents);
  if ($optimize) {

    // Perform some safe CSS optimizations.
    // Regexp to match comment blocks.
    $comment = '/\\*[^*]*\\*+(?:[^/*][^*]*\\*+)*/';

    // Regexp to match double quoted strings.
    $double_quot = '"[^"\\\\]*(?:\\\\.[^"\\\\]*)*"';

    // Regexp to match single quoted strings.
    $single_quot = "'[^'\\\\]*(?:\\\\.[^'\\\\]*)*'";

    // Strip all comment blocks, but keep double/single quoted strings.
    $contents = preg_replace("<({$double_quot}|{$single_quot})|{$comment}>Ss", "\$1", $contents);

    // Remove certain whitespace.
    // There are different conditions for removing leading and trailing
    // whitespace.
    // @see http://php.net/manual/en/regexp.reference.subpatterns.php
    $contents = preg_replace('<
      # Strip leading and trailing whitespace.
        \\s*([@{};,])\\s*
      # Strip only leading whitespace from:
      # - Closing parenthesis: Retain "@media (bar) and foo".
      | \\s+([\\)])
      # Strip only trailing whitespace from:
      # - Opening parenthesis: Retain "@media (bar) and foo".
      # - Colon: Retain :pseudo-selectors.
      | ([\\(:])\\s+
    >xS', '$1$2$3', $contents);

    // End the file with a new line.
    $contents = trim($contents);
    $contents .= "\n";
  }

  // Replaces @import commands with the actual stylesheet content.
  // This happens recursively but omits external files.
  $contents = preg_replace_callback('/@import\\s*(?:url\\(\\s*)?[\'"]?(?![a-z]+:)([^\'"\\()]+)[\'"]?\\s*\\)?\\s*;/', '_advagg_drupal_load_stylesheet', $contents);
  return $contents;
}